| 摘要 |
PURPOSE:To eliminate a synchronization detecting error and to improve the reliability of corrected synchronization information by removing a signal errone ously separated together with synchronization information, which is caused by noise, etc., and supplementing omitted synchronization information. CONSTITUTION:When a clock signal WCK generated on the basis of a signal available from delaying arbitrarily a gated synchronization information GHS is inputted from a terminal, oscillation is stopped during a horizontal blanking period, but the oscillation except said case continues. If the normal horizontal synchronization information is omitted, horizontal synchronization information is not outputted from an AND circuit 12, and during the horizontal blanking period the clock signal is not stopped. Since a correcting signal CO is outputted so that a counter circuit 50 can start the counting of the clock signal WCK, a signal can be processed in spite of the omission of the synchronization information.
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